They do not contain aborted fetus cells. This is noise, and I wouldn't be surprised if it was planted by shills to discredit us.
What happens is : The pharmaceutical companies (Pfizer and Moderna in the US, AstraZeneca in UK,don't know about the others) employed cells cloned from tissue originated from freezed embryos and aborted fetuses to do the research that produced the vaccine compounds. And the vaccines are far from being the only product that employed this kind of technique in their R&D phase. This is what makes them immoral, so you can provide the conscience objection argument (doubly valid for catholics).
These are the facts, so you don't get "debooonked" by some moron who believes Snopes.
Actually I copied the Pfizer ingredients to look up each one- cause they keep saying those allergic to any ingredients shouldn’t take it- I just haven’t had a chance yet but here’s what they put out: he Pfizer-BioNTech COVID-19 Vaccine includes the following ingredients: mRNA, lipids ((4-hydroxybutyl)azanediyl)bis(hexane-6,1-diyl)bis(2-hexyldecanoate), 2 [(polyethylene glycol)-2000]-N,N-ditetradecylacetamide, 1,2-Distearoyl-sn-glycero-3- phosphocholine, and cholesterol), potassium chloride, monobasic potassium phosphate, sodium chloride, dibasic sodium phosphate dihydrate, and sucrose.